3 * \brief Interrupt controller.
7 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
8 * Alexander Warg <warg@os.inf.tu-dresden.de>,
9 * Torsten Frenzel <frenzel@os.inf.tu-dresden.de>
10 * economic rights: Technische Universität Dresden (Germany)
12 * This file is part of TUD:OS and distributed under the terms of the
13 * GNU General Public License 2.
14 * Please see the COPYING-GPL-2 file for details.
16 * As a special exception, you may use this file as part of a free software
17 * library without restriction. Specifically, if other files instantiate
18 * templates or use macros or inline functions from this file, or you compile
19 * this file and link it with other files to produce an executable, this
20 * file does not by itself cause the resulting executable to be covered by
21 * the GNU General Public License. This exception does not however
22 * invalidate any other reasons why the executable file might be covered by
23 * the GNU General Public License.
27 #include <l4/sys/kernel_object.h>
28 #include <l4/sys/ipc.h>
31 * \defgroup l4_icu_api Interrupt controller
32 * \ingroup l4_kernel_object_api
34 * \brief The ICU class.
36 * <c>\#include <l4/sys/icu.h></c>
41 * \brief Flags for IRQ numbers used for the ICU.
47 * \brief Flag to denote that the IRQ is actually an MSI.
50 * This flag may be used for l4_icu_bind() and l4_icu_unbind() functions to
51 * denote that the IRQ number is meant to be an MSI.
53 L4_ICU_FLAG_MSI = 0x80000000,
58 * \brief Interrupt flow types.
63 L4_IRQ_F_NONE = 0, /**< None */
64 L4_IRQ_F_LEVEL = 0x2, /**< Level triggered */
65 L4_IRQ_F_EDGE = 0x0, /**< Edge triggered */
66 L4_IRQ_F_POS = 0x0, /**< Positive trigger */
67 L4_IRQ_F_NEG = 0x4, /**< Negative trigger */
68 L4_IRQ_F_LEVEL_HIGH = 0x3, /**< Level high trigger */
69 L4_IRQ_F_LEVEL_LOW = 0x7, /**< Level low trigger */
70 L4_IRQ_F_POS_EDGE = 0x1, /**< Positive edge trigger */
71 L4_IRQ_F_NEG_EDGE = 0x5, /**< Negative edge trigger */
72 L4_IRQ_F_MASK = 0x7, /**< Mask */
77 * \brief Opcodes to the ICU interface.
90 * \brief Unbind opcode.
92 * \see l4_icu_unbind()
104 * \brief Msi-info opcode.
106 * \see l4_icu_msi_info()
108 L4_ICU_OP_MSI_INFO = 3,
109 L4_ICU_OP_UNMASK = 4,
111 L4_ICU_OP_SET_MODE = 6
116 L4_ICU_CTL_UNMASK = 0,
122 * \brief Info structure for an ICU.
123 * \ingroup l4_icu_api
125 * This structure contains information about the features of an ICU.
126 * \see l4_icu_info().
128 typedef struct l4_icu_info_t
131 * \brief Feature flags.
133 * If #L4_ICU_FLAG_MSI is set the ICU supports MSIs.
138 * \brief The number of IRQ lines supported by the ICU,
143 * \brief The number of MSI vectors supported by the ICU,
149 * \brief Bind an interrupt vector of an interrupt controller to an interrupt object.
150 * \ingroup l4_icu_api
152 * \param icu ICU to use.
153 * \param irqnum IRQ vector at the ICU.
154 * \param irq IRQ capability to bind the IRQ to.
155 * \return Syscall return tag
157 L4_INLINE l4_msgtag_t
158 l4_icu_bind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW;
163 L4_INLINE l4_msgtag_t
164 l4_icu_bind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
165 l4_utcb_t *utcb) L4_NOTHROW;
168 * \brief Remove binding of an interrupt vector from the interrupt controller object.
169 * \ingroup l4_icu_api
171 * \param icu ICU to use.
172 * \param irqnum IRQ vector at the ICU.
173 * \param irq IRQ object to remove from the ICU.
174 * \return Syscall return tag
176 L4_INLINE l4_msgtag_t
177 l4_icu_unbind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW;
182 L4_INLINE l4_msgtag_t
183 l4_icu_unbind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
184 l4_utcb_t *utcb) L4_NOTHROW;
186 L4_INLINE l4_msgtag_t
187 l4_icu_set_mode(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode) L4_NOTHROW;
192 L4_INLINE l4_msgtag_t
193 l4_icu_set_mode_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode,
194 l4_utcb_t *utcb) L4_NOTHROW;
197 * \brief Get info about capabilites of ICU.
198 * \ingroup l4_icu_api
200 * \param icu ICU to use.
201 * \param info Pointer to an info structure to be filled with information.
202 * \return Syscall return tag
204 L4_INLINE l4_msgtag_t
205 l4_icu_info(l4_cap_idx_t icu, l4_icu_info_t *info) L4_NOTHROW;
210 L4_INLINE l4_msgtag_t
211 l4_icu_info_u(l4_cap_idx_t icu, l4_icu_info_t *info,
212 l4_utcb_t *utcb) L4_NOTHROW;
215 * \brief Get MSI info about IRQ.
216 * \ingroup l4_icu_api
218 * \param icu ICU to use.
219 * \param irqnum IRQ vector at the ICU.
220 * \param msg Pointer to a word to receive the message that must be used
221 * for the PCI devices MSI message.
222 * \return Syscall return tag
224 L4_INLINE l4_msgtag_t
225 l4_icu_msi_info(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg) L4_NOTHROW;
230 L4_INLINE l4_msgtag_t
231 l4_icu_msi_info_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg,
232 l4_utcb_t *utcb) L4_NOTHROW;
235 L4_INLINE l4_msgtag_t
236 l4_icu_unmask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
237 l4_timeout_t to) L4_NOTHROW;
239 L4_INLINE l4_msgtag_t
240 l4_icu_mask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
241 l4_timeout_t to) L4_NOTHROW;
246 L4_INLINE l4_msgtag_t
247 l4_icu_control_u(l4_cap_idx_t icu, unsigned irqnum, unsigned op,
248 l4_umword_t *label,l4_timeout_t to,
249 l4_utcb_t *utcb) L4_NOTHROW;
252 /**************************************************************************
256 L4_INLINE l4_msgtag_t
257 l4_icu_bind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
258 l4_utcb_t *utcb) L4_NOTHROW
260 l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
261 m->mr[0] = L4_ICU_OP_BIND;
263 m->mr[2] = l4_map_obj_control(0, 0);
264 m->mr[3] = l4_obj_fpage(irq, 0, L4_FPAGE_RWX).raw;
265 return l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 1, 0), L4_IPC_NEVER);
268 L4_INLINE l4_msgtag_t
269 l4_icu_unbind_u(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq,
270 l4_utcb_t *utcb) L4_NOTHROW
272 l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
273 m->mr[0] = L4_ICU_OP_UNBIND;
275 m->mr[2] = l4_map_obj_control(0, 0);
276 m->mr[3] = l4_obj_fpage(irq, 0, L4_FPAGE_RWX).raw;
277 return l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 1, 0), L4_IPC_NEVER);
280 L4_INLINE l4_msgtag_t
281 l4_icu_info_u(l4_cap_idx_t icu, l4_icu_info_t *info,
282 l4_utcb_t *utcb) L4_NOTHROW
285 l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
286 m->mr[0] = L4_ICU_OP_INFO;
287 res = l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 1, 0, 0), L4_IPC_NEVER);
288 if (!l4_msgtag_has_error(res) && l4_msgtag_label(res) >= 0
289 && l4_msgtag_words(res) >= 3)
291 info->features = m->mr[0];
292 info->nr_irqs = m->mr[1];
293 info->nr_msis = m->mr[2];
298 L4_INLINE l4_msgtag_t
299 l4_icu_msi_info_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg,
300 l4_utcb_t *utcb) L4_NOTHROW
303 l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
304 m->mr[0] = L4_ICU_OP_MSI_INFO;
306 res = l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 0, 0), L4_IPC_NEVER);
307 if (!l4_msgtag_has_error(res) && l4_msgtag_label(res) >= 0
308 && l4_msgtag_words(res) >= 1)
315 L4_INLINE l4_msgtag_t
316 l4_icu_bind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW
317 { return l4_icu_bind_u(icu, irqnum, irq, l4_utcb()); }
319 L4_INLINE l4_msgtag_t
320 l4_icu_unbind(l4_cap_idx_t icu, unsigned irqnum, l4_cap_idx_t irq) L4_NOTHROW
321 { return l4_icu_unbind_u(icu, irqnum, irq, l4_utcb()); }
323 L4_INLINE l4_msgtag_t
324 l4_icu_info(l4_cap_idx_t icu, l4_icu_info_t *info) L4_NOTHROW
325 { return l4_icu_info_u(icu, info, l4_utcb()); }
327 L4_INLINE l4_msgtag_t
328 l4_icu_msi_info(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *msg) L4_NOTHROW
329 { return l4_icu_msi_info_u(icu, irqnum, msg, l4_utcb()); }
334 L4_INLINE l4_msgtag_t
335 l4_icu_control_u(l4_cap_idx_t icu, unsigned irqnum, unsigned op,
336 l4_umword_t *label, l4_timeout_t to,
337 l4_utcb_t *utcb) L4_NOTHROW
339 l4_msg_regs_t *m = l4_utcb_mr_u(utcb);
340 m->mr[0] = L4_ICU_OP_UNMASK + op;
343 return l4_ipc_send_and_wait(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 0, 0),
346 return l4_ipc_send(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 2, 0, 0), to);
349 L4_INLINE l4_msgtag_t
350 l4_icu_unmask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
351 l4_timeout_t to) L4_NOTHROW
352 { return l4_icu_control_u(icu, irqnum, L4_ICU_CTL_UNMASK, label, to, l4_utcb()); }
354 L4_INLINE l4_msgtag_t
355 l4_icu_mask(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t *label,
356 l4_timeout_t to) L4_NOTHROW
357 { return l4_icu_control_u(icu, irqnum, L4_ICU_CTL_MASK, label, to, l4_utcb()); }
359 L4_INLINE l4_msgtag_t
360 l4_icu_set_mode_u(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode,
361 l4_utcb_t *utcb) L4_NOTHROW
363 l4_msg_regs_t *mr = l4_utcb_mr_u(utcb);
364 mr->mr[0] = L4_ICU_OP_SET_MODE;
367 return l4_ipc_call(icu, utcb, l4_msgtag(L4_PROTO_IRQ, 3, 0, 0), L4_IPC_NEVER);
370 L4_INLINE l4_msgtag_t
371 l4_icu_set_mode(l4_cap_idx_t icu, unsigned irqnum, l4_umword_t mode) L4_NOTHROW
373 return l4_icu_set_mode_u(icu, irqnum, mode, l4_utcb());